Any gasser carb will work with glow fuel if the fuel passages are large enough...The WT499 uses the exact same rebuild parts as all the other WT carbs..It works because the fuel passages are already large enough to flow either fuel...An otherwise stock G26 with a WT499 picks up 600 rpm using glow fuel and the stock mag ignition and spark plug..
There is a statement about using other fuels in Walbro carbs on my website..First page..
rcignitions.com